I regret____that we can’t stay here any longer.
After the earthquake, the first thing the local government did was to provide for the homeless families.
________ this cake, you'll need 2 eggs, 175 g sugar and 175 g flour.
Although the causes of cancer ________, we do not yet have any practical way to prevent it.
Someone who lacks staying power and perseverance is unlikely to _________ a good researcher.
They _________ two free tickets to Canada, otherwise they'd never have been able to afford to go.